Teaching CSIR NET Mock Test Series Chemical Sciences Approximate Methods of Quantum Mechanics Perturbation Theory
The unperturbed energies (in eV) of a three-level system are ε0 = 0, ε1 = 8 and ε2 = 12. The matrix elements of a perturbation V (in eV) between the levels (in subscript) are V10 = 6, V20 = 8 and V12 = 14. The second-order correction to the ground state energy (in eV) in the presence of perturbation V is
1
- 12.4
2
- 9.83
3
- 8.56
4
- 3.04